Between years in the hunting fields and years hunting men, there’s a particular set of noises you hear and expect and can identify in each situation.
The problem for some of us, is hearing damage and the associated missing noises or additional noises such as tinnitus.
Weapons, that’s going to vary heavily for most of us.
Unlike a war zone where only a handful of different guns are normally used, M16 and AK for example, and you can easily tell the difference, a .30-30 fired from the same place as a .300 Mag would sound like it came from a different distance rather than just the same direction.
Other rounds/firearms such as 9mm carbines, the sound can play tricks on you.